Apparatus for forming protected metal sheets.



J. H. CAFFREY.

APPARATUS FOR FORMING PROTECTED METAL SHEETS.

APPLICATION FILED OCT- 14, I914.

Patented Jan. 16, 1917.

3 SHEETS-SHEET l.

M Q fay b ww b I S J.

J. H. CAFFREY. APPARATUS FOR FORMING PROTECTED METAL SHEETS.

APPLICATION FILED OCT. 14. I914.

1 ,21 2,324. Patented Jan. 16,1917.

3 SHEETS-SHEET 2.

J. H. CAFFREY.

APPARATUS FOR FORMING PROTECTED METAL SHEETS. APPLICATION FILED 001.14.1914.

3 SHEETS-SHEET 3.

KL a? {m AM my X A T (L Q N 51 {3A JAMES IrcArrnnY,

PROTECTED METAL COMPANY, or MASsAcHUsnTTs.

0F BEAVER FALLS, PENNSYLVANIA, ASSIGNOR TO ASBESTOS 0F BEAVER FALLS, PENNSYLVANIA, A CORPORATION APPARATUS FOR FORMING PROTECTED METAL SHEETS.

Specification of Letters Patent. Patentgd Jan, 16 191'? Application filed October 14:, 1914. Serial No. 866,685.

tected Metal Sheets, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to an apparatus for J forming protected metal sheets, of that character in which the side edges of the metal sheet are enveloped by the protective layer.

The, apparatus is especially adapted for forming asbestos protected metal sheets, comprising an iron or steel sheet covered with an adhesive, such as asphalt or bitumen, and an outer layer of asbestos in sheet form.

1n the present instance, the apparatus is represented as employed for forming protected metal sheets of substantially small size, substantially that of a shingle, and to facilitate description, the productformed by the apparatus will be hereinafter referred to as a protected metal shingle.

The apparatus herein shown comprises essentially a5 feed member, a coating member .and a covering member. The feedmember feeds the metal blank or shingle into the coating member, which is provided with a whichthe metal shingle is fed, and from which it passes to the covering member, in which the coated metal shingle vis covered by a sheet, layer or web of asbestos paper 9r other fibrous material, which is arranged with relation-to the metal shingle so that its sides may be folded over the side edges of the shingle and upon the upper Surface of the same. tributingthe coating material 'oras halt over the upper and lower surfaces'o the metal shingle, and forinsuringia surplus of asphalt at or near the transverse center of the metal shingle, to provide for sealing the overlapping edges of the protective layer or sheet, as will be described. ,Provision is also made for sealing together the overlapping edges of the protective layer or sheet, as will be described.

These and other featuresof Provision is made for dis v, tobe entirely-covered by the. same. this invention will be pointed out in the claims at the end of this specification.

Figure 1 is a side elevation of an apparatus embodying this invention. Figs. 2 and 3 are plan views of the apparatus shown in Fig. l-when read together. Figs. 4 and 5, details of one of the distributing or spreading rolls Shown in Fig. 1. Fig. 6, an en- 'larged section, taken on the line 6-6, Fig. 3,

and Fig. 7, an -enlarged section taken on the line 7-7, Fig. .1.

In the resent instance I have shown one construction of apparatus in which the metal shingles a are fed automatically by a feed member 79 into a coating member 0, in whichthe metal shingle is provided with a coating of liquid asphalt or other adhesive material, and from which the coated metal shingle a is fed to a covering member d, by means of Which the coated metal shingle ishermetically sealed by a protectivesheet or layer e. In the present instance, the feed member 6 is shown as an endless carrier or link chain 10, which is passed about sprocket wheels 12, 13, mounted upon shafts 14, 15, suitably supported and located at the opposite ends of a guideway, formed by side bars 16, 17, see Figs. 3 and 7, which are supported by a framework '18.

The link chain 10-is moved in a substantially horizontal plane betweenthe side bars 16, 17, and is provided at suitable intervals with lugs or projectives 19, which serve as pushers for the metal shingle a, to push the same forward into engagement with a pair of feed rolls 20, 21, mounted in boxes 22, 23, the upper feed roll 20 being permitted to yield with relation to the lower feed roll 21 by springs 24 in a manner well understood.

The metal shingle a is fed by the feed rolls 20, 21, under a guide or deflecting roll 25, which deflects the metal shingle down into guideways 26, 27, formed by guide bars 28,29, which extend lengthwise of a kettle or-vat 30 containing adhesive material, preferably asphalt or like bitumen. The kettle '30 may be heated in anysuitable manner to keep the asphalt fluid. The guide bars 28,

29, are curved, so that the metal shingle a on its passage through the coating bath contained in the kettle or vat 30', will be submerged in' the coating .bath or asphalt, so as metalshingle a-is fed through the coating The apparatus, as shown, by a plurality of pairs of feed rolls 31, 32, which are mounted on shafts 33, 34, journaled in boxes 35, 36, the upper roll'31 of each pair of feed rolls being yieldingly backed up by springs 37 so that greater portion of the metal'shingle, and for providing for a surplus of asphalt at or near the transverse center of the metal shingle. For this purpose a pair of rolls 40, 41 are mounted upon shafts 42, 43, with the upper shaft 42 journaled in boxes 44, which are yielding backed up by springs 45. The rolls 42, 43, are provided on their circumference Y with helical .grooves or channels 46, 47 see Figs.- 1 and 4, which extend from, at or near the center of the rolls toward their opposite ends, and said rolls are also provided with substantially parallel longitudinally extendported second pair of feed rolls58, 59, is located at the opposite end of the framework 55, and

ed grooves or channel 48, which intersect the helical grooves. These grooves serve to distribute the asphalt evenly over the shingle from, at or near the side edges thereof. to the transverse center thereof. The upper roll 40 may and preferably willbe provided substantially at or near its longitudinalcenter with an annular groove 49, which serves as a reservoir to hold a surplus quantity of asphalt, for a purpose as will be described. I

The rolls 40, 41, also act as feed rolls to feed the coated metal shingle onto the web,

sheet or layer e of protective fibrous material, preferably asbestos paper, which is taken from a roll 51 and led over a supportor bed roll 52, which is located near the delivery end of the 'kettle 30. The protective layer or sheet e is then fed through the coveringapparatus, which may and preferably will be made as herein shown, and which is provided with a pair of feed rolls 53, 54, located adjacent to the bed roll 52 and supupon a suitable framework 55. A

between these pairs of feed rolls is located a series of supporting rolls 60 herein shown as three in number, and also a plurality of pairs of folding over rolls 6' The covering apparatus is further provi ed with means for turning the portions of the covering sheet 0 which projects beyond the sides of the metal shingle, first into a position sub stantially at right angles to the metal shingle and then over upon and substantially parallel with said shingle.

In the present instance, the bed roll 52 has coeperating with it upright side pieces 62, 63, which converge toward the feed rolls 53, 54, and serve to bend the sides of the covering sheet 6 into a substantially upright position and to direct said sides between en'd flanges on the feed rolls 53, 54, from which the up-turned sides of the paper sheet are carried forward to the first pair of folding over rolls 61, by which the sides of the paper sheet are partially folded over the shingles.

The partially folded sides of the sheet are then folded over stillfarther toward the longitudinal center of the metal shingle by the second pair of folding over rolls 61, and the folding is completed by the third set of folding over rolls 61 as represented in Fig.

2. It will be understood, that the pairs of folding over rolls 61 are properly shaped and proportioned to gradually turn or bend the sides of the paper sheet and thus avoid cracking or breaking the same. The last set or pair'of folding overrolls 61 brings the folded over sides of the paper sheet into superimposed position substantially parallel with the metal shingle, see Fig. 2, and the over-lapping sides of the paper sheet are pressed together by passing through the pressure rolls 58, 59, from which they pas between a pair of rolls 75, 76, the lower one of which has passed about it an endless band or conveyer? 7 by which the covered shingle is carried away from the apparatus.

, The upper roll 75 is a presser and feed roll, which is preferably provided with a coveringof felt 79, which serves to press the overlapping side of-the paper sheet marked 80 in Fig. 2 down into contact with the "coated surface of the metal shingle at the edge of the underlying side of the paper sheet marked '81, and the felt covering also presses the protective sheet into close contact with the metal sheet or shingle and compensates for irregularities in the surface of the shingle. .The flap 80 of the paper sheet, which overlaps the other flap 81 of the paper, is cemented to the latter by the surplus cement or asphalt, which is supplied to the upper surface of the metal shingle by the annular groove or channel 49, which latter insures a sufficient supply of asphalt or. "cement for this purpose.

By reference to Fig. 2, it will be seen that the sheet or web e of asbestos or other paper has its sides folded over a plurality of metal shingles a, which are spaced apart, and that between adjacent metal shingles the sides of the paper sheet are cemented to the lower layer of the said paper sheet, with the result that each coated shingle is sealed at its sides and ends.

In the present instance the metal sheet is described as a metal shingle and is shown as of a size approximately that of the ordinary shingle, but it is not desired to limit the in ,vention to an apparatus for covering metal shingles, as it is evident that it can be proportioned and arranged to handle metal sheets of any desired size within limits. The rotatable members of the feeding and coating members may be operatively connected through suitable gears 90 with a main or driving shaft 91, and as this methodof driving is Well known, it is not deemed necessary to identify by number the individual gears.

The operation of the apparatus maybe briefly described as follows: Assume that the kettle 30 is heated and the asphalt bath contained therein is fluid. The operator starts the main or driving shaft 91 in 1110- tion, which through the gears 90 or otherwise,/ sets the feed mechanisms in motion.

He then places the shingles a upon the link chain 10 between the lugs 19, and each shingle is delivered to the feed rolls 2Q, 21, which feedit under the roll 25, by which it is deflected down into the guide. ..ways 26, 27, in the kettle 30, and is fed forward into and out of the bath of the fluid asphalt by the rolls 31, 32. The metal shingle coated with asphalt is then passed between the rolls 40, 41, which spread the asphalt evenly over the shingle except at the center of the upper surface of the shingle, which receives I the coated upper surface of the shingle as above described.

I have herein shown and described one construction of apparatus embodying this invention, but it is-not desired to limit the invention to the particular construction shown.

The helical grooves inthe rolls 40, 41,

1. serve to carry the surplus asphalt away from the side edges of the rolls and toward the transverse center of the same and into the annular groove 49, wherein it is retained to provide a surplus for cementing the over lapped portions 80, 81, of the paper layer.

Claims:

I In an apparatus of the character described, in combmation, a kettle for containing a bath of adhesive material, means for feeding a metal sheet into and out of said kettle to coat the'same with adhesive material, means for applying to one surface of the coated metal sheet a layer of fibrous material of greater width than said metal sheet to leave portions of. the said fibrous layer projecting beyond the sides of the metal sheet, and means for folding the projecting side portions. of the fibrous layer' means for applying to one surface of the coated metal sheet a layer of fibrous material of greater width thansaid metal sheet to leave portions of the said fibrous layer projecting beyond the sides of the metal sheet, and means for folding the projecting side portions of the fibrous layer over upon the other surface of the coated metal sheet.

3. In an apparatus of the character described, in'combination, a kettle for containing a bath of adhesive material, means for feeding a metal sheet into and out ofsaid kettle to coat the same with adhesive material, means for spreading the adhesive material evenly over the surfaces of said metal sheet, means for applying to one surface of the coated metal sheet a layer of' fibrous material of greater width than said metal sheet to leave portions of the said fibrous layer projecting beyond the sides of the metal sheet, and means for folding the projecting side portions of the fibrous layer over upon the other surface of the coated metal sheet.

4. In an apparatus of the character described, ain combination, a kettle for containing a bath of adhesive material, means for feeding a metal sheet through said kettle to coat the same w1th adhes ve material,

means for applying a surplus of adhesive material to one surface of the metal sheet between the sides of the latter, means for. applying to one surface of the coated meta sheet a layer of fibrous material of greater width than said metal sheet-to leave portions of the said fibrous layer pro ecting beyond the sides of the metal sheet, and means for folding the pro ecting side portions of the fibrous layer over-upon the other surface of the coated metal sheet.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES H. CAFFREY.

Witnesses:

H. F. I-IAwmNs, Josnrn MYSHRALL. 

